Improvement in grain-separators



Patented May 2,1871.

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Letters Patent No. 114,500, dated May 2, 1871.

IMPROVEMENT lN GRAlN-SEPARATORS.

The Schedule referred to in these Letters Patent and making part of thesame- To all whom it may concern.-

Be it known that I, HENRY L. WHITMAN, of St. Louis, in the county of St.Louis and in the State of Missouri, have invented certain new and usefulImprovements inGraiu-Separators; and do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing bad to the accompanying drawing making a part of thisspecification, in which- Figure 1 is an elevation of the rear end of aseparater with my improvement attached;

Figure 2 is an enlarged side elevation of the inner end of the pitman;

Figure 3 is a plan view of the upper side of the same, with theball-pin. removed; and V Figure 4 is a vertical cross-section on theline a: x of fig. 2.

Letters of like name and kind refer to like parts in each of thefigures.

The object of my invention is to communicate a laterally-vibratorymotion to the sieves of a grain-separator without in any mannerinterfering with a free longitudinal movement of the same; and

It consists in the peculiar construction of the inner end of the pitmanor connection, substantially as is hereinafter shown.

In the annexed drawing- A represents the frame of a separatgg', havingsuspended from and within the'same, in the usual manner, a shoe, B, uponwhich rests a series of sieves, 0, all of ordinary construction.

Resting within suitable bearings, D, secured upon the side of the frame,is a shaft, E eonnected at its forward end with the operating mechanism,and provided at its rear end with a circular metal disk, F, containingnear one edge a crank-pin, f, placed in a line with said shaft.

Pivoted to or upon the pin f is one end of a pitman or connection, G,the opposite end of which is shod with metal, constructed preferably intwo parts, H, bolted upon opposite sides of said pitman, and pro: videdwith a spherical cavity, h, open at its upper side.

A lug, I, having upon its outerv end a bearing, 1', that corresponds inshape with but has a slightly smaller size than the cavity h, is securedto and projects downward from the shoe'B at its transverse center, andin a line with the crank-pin f, and furnishes a pivotal bearing for theinner end of the pitman, which is attached thereto by spreading thesections H until they may be passed over said bearing, after which theymay be closed together so as to cause said bearing to be embraced withinthe spherical cavity h, with its neck t passing outward through theopening in the latter.

As thus connected the usual vibratory motion may be given to the shoeand its sieves without interfering with their free longitudinal orvertical movement, or causing undue strain upon orwear of the bearing,by which means the efliciency and durability of the machine are largelyincreased without a corresponding sieves O, the ball-and-socket jointconnection H and I, substantially as and for the purpose specified.

In testimony that I claim the foregoing I have hereunto set my hand this21st day of February, 1871.

HENRY L. WHITMAN. Witnesses.

ALEXANDER LowRY, HENRY PETERS.

